Update torch.ops.aten.all ref to be symbolic-trace friendly

[wconstab]

• previous impl compared the summed bool values of the tensor to its nelem, which in a symbolic world is a symint and can't be coerced back into a bool for the purpose of shoving into a result tensor

• new impl adds one extra negation op but avoids the need to compare to the symbolic nelem

[pytorch-bot]

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[mruberry]

Cool; this is an interesting case and we should think how best to express this limitation to users

[wconstab]

@pytorchbot merge -a

[pytorch-bot]

❌ 🤖 pytorchbot command failed:

@pytorchbot: error: unrecognized arguments: -a

usage: @pytorchbot [-h] {merge,revert,rebase,label} ...

Try @pytorchbot --help for more info.

[wconstab]

@pytorchbot merge

[pytorchmergebot]

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[github-actions]

Hey @wconstab.
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